Over a Century of Innovation in Ignition Technology
Bosch has been shaping engine performance for over 120 years — producing spark plugs since 1902 and glow plugs since 1922. The development of these components was a turning point, establishing Bosch as a pioneering force in the global automotive industry.
Since then, Bosch has introduced over 20,000 spark plug variants, now covering everything from passenger cars to small engines and industrial machinery. Meanwhile, Bosch glow plugs have evolved in line with diesel engine advancements, delivering greater efficiency and power. Today, they are available for nearly every diesel vehicle on the European market.
Did you know?
In 1902, the first series spark plug was built in combination with a high-voltage magneto.
In 1922, the first Bosch glow plug for heavy oil engines relocated the necessary preheating of the engine to the inside of the combustion chamber. Previously, soldering irons or even open flames were used for this purpose.
Glow Plug Function – More Than Just a Starting Aid
Modern glow plugs do more than preheat the engine during startup—they continue to operate even after the engine is running. This post-glow phase helps maintain efficient combustion and improved fuel economy, especially in stop-and-go or urban driving conditions.
Regular Glow Plug Checks – Because They Wear Over Time
Glow plugs are consumable components and should be inspected regularly to ensure optimal engine performance and reliable cold starts.
Easy Glow Plug Replacement – Save Time with the Right Technique
Replacing glow plugs is straightforward with the correct tools and method. Click below to watch Bosch’s expert guide on proper glow plug removal and installation.
Precious-metal spark plugs - Product range and details
Bosch spark plugs are engineered to deliver consistent, reliable ignition performance tailored to each specific engine. Manufactured to original equipment standards, they offer the same high quality as those used by vehicle manufacturers.
Spark plugs without precious metal - Product range and details
Bosch Nickel spark plugs feature a durable ground electrode made from nickel alloy, delivering reliable performance and proven ignition technology. They are suitable for a broad range of engine applications.
Bosch Super 4 spark plugs offer enhanced protection against carbon fouling, thanks to their innovative surface air gap technology. They are a recommended alternative for many older passenger car models.
Bosch Nickel spark plugs for small engines feature a robust nickel alloy ground electrode, ensuring reliable performance. They are suitable for a wide variety of applications across different engine types.
Bosch industrial spark plugs, available in Double-Platinum and Double-Iridium versions, are specifically designed for use in stationary gas engines, offering durability and high-performance ignition.
Explore the full range of Bosch spark plugs and Bosch glow plugs available at APD – engineered for performance, reliability, and precision across all engine types.